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Finding the Fourth Proportional to 465.96, 699.35 and 321.78

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Solution

The fourth proportional to 465.96, 699.35 and 321.78 is: 482.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.96 : 699.35 = 321.78 : x
  2. Step 2: Convert to fraction form
    465.96/699.35 = 321.78/x
  3. Step 3: Cross multiply
    465.96x = 699.35 × 321.78
  4. Step 4: Simplify right side
    465.96x = 225,035.23
  5. Step 5: Solve for x
    x = 225,035.23/465.96
  6. Step 6: Final answer
    x = 482.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.